Finding the Third Proportional to 69,280 and 99,072

Step by Step Solution

1. Step 1: Write the proportion equation
   69,280 : 99,072 = 99,072 : x
2. Step 2: Convert to fraction form
   69,280/99,072 = 99,072/x
3. Step 3: Cross multiply
   69,280x = 99,072 × 99,072
4. Step 4: Simplify right side
   69,280x = 9,815,261,184
5. Step 5: Solve for x
   x = 9,815,261,184/69,280
6. Step 6: Final answer
   x = 141,675.25